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18#include "xfs.h"
19#include "xfs_fs.h"
20#include "xfs_shared.h"
21#include "xfs_format.h"
22#include "xfs_log_format.h"
23#include "xfs_trans_resv.h"
24#include "xfs_bit.h"
25#include "xfs_sb.h"
26#include "xfs_mount.h"
27#include "xfs_inode.h"
28#include "xfs_ialloc.h"
29#include "xfs_alloc.h"
30#include "xfs_error.h"
31#include "xfs_trace.h"
32#include "xfs_cksum.h"
33#include "xfs_trans.h"
34#include "xfs_buf_item.h"
35#include "xfs_bmap_btree.h"
36#include "xfs_alloc_btree.h"
37#include "xfs_ialloc_btree.h"
38#include "xfs_log.h"
39
40
41
42
43
44
45
46
47
48
49struct xfs_perag *
50xfs_perag_get(
51 struct xfs_mount *mp,
52 xfs_agnumber_t agno)
53{
54 struct xfs_perag *pag;
55 int ref = 0;
56
57 rcu_read_lock();
58 pag = radix_tree_lookup(&mp->m_perag_tree, agno);
59 if (pag) {
60 ASSERT(atomic_read(&pag->pag_ref) >= 0);
61 ref = atomic_inc_return(&pag->pag_ref);
62 }
63 rcu_read_unlock();
64 trace_xfs_perag_get(mp, agno, ref, _RET_IP_);
65 return pag;
66}
67
68
69
70
71struct xfs_perag *
72xfs_perag_get_tag(
73 struct xfs_mount *mp,
74 xfs_agnumber_t first,
75 int tag)
76{
77 struct xfs_perag *pag;
78 int found;
79 int ref;
80
81 rcu_read_lock();
82 found = radix_tree_gang_lookup_tag(&mp->m_perag_tree,
83 (void **)&pag, first, 1, tag);
84 if (found <= 0) {
85 rcu_read_unlock();
86 return NULL;
87 }
88 ref = atomic_inc_return(&pag->pag_ref);
89 rcu_read_unlock();
90 trace_xfs_perag_get_tag(mp, pag->pag_agno, ref, _RET_IP_);
91 return pag;
92}
93
94void
95xfs_perag_put(
96 struct xfs_perag *pag)
97{
98 int ref;
99
100 ASSERT(atomic_read(&pag->pag_ref) > 0);
101 ref = atomic_dec_return(&pag->pag_ref);
102 trace_xfs_perag_put(pag->pag_mount, pag->pag_agno, ref, _RET_IP_);
103}
104
105
106
107
108STATIC int
109xfs_mount_validate_sb(
110 xfs_mount_t *mp,
111 xfs_sb_t *sbp,
112 bool check_inprogress,
113 bool check_version)
114{
115 if (sbp->sb_magicnum != XFS_SB_MAGIC) {
116 xfs_warn(mp, "bad magic number");
117 return -EWRONGFS;
118 }
119
120
121 if (!xfs_sb_good_version(sbp)) {
122 xfs_warn(mp, "bad version");
123 return -EWRONGFS;
124 }
125
126
127
128
129
130
131 if (check_version && XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) {
132 if (xfs_sb_has_compat_feature(sbp,
133 XFS_SB_FEAT_COMPAT_UNKNOWN)) {
134 xfs_warn(mp,
135"Superblock has unknown compatible features (0x%x) enabled.",
136 (sbp->sb_features_compat &
137 XFS_SB_FEAT_COMPAT_UNKNOWN));
138 xfs_warn(mp,
139"Using a more recent kernel is recommended.");
140 }
141
142 if (xfs_sb_has_ro_compat_feature(sbp,
143 XFS_SB_FEAT_RO_COMPAT_UNKNOWN)) {
144 xfs_alert(mp,
145"Superblock has unknown read-only compatible features (0x%x) enabled.",
146 (sbp->sb_features_ro_compat &
147 XFS_SB_FEAT_RO_COMPAT_UNKNOWN));
148 if (!(mp->m_flags & XFS_MOUNT_RDONLY)) {
149 xfs_warn(mp,
150"Attempted to mount read-only compatible filesystem read-write.");
151 xfs_warn(mp,
152"Filesystem can only be safely mounted read only.");
153
154 return -EINVAL;
155 }
156 }
157 if (xfs_sb_has_incompat_feature(sbp,
158 XFS_SB_FEAT_INCOMPAT_UNKNOWN)) {
159 xfs_warn(mp,
160"Superblock has unknown incompatible features (0x%x) enabled.",
161 (sbp->sb_features_incompat &
162 XFS_SB_FEAT_INCOMPAT_UNKNOWN));
163 xfs_warn(mp,
164"Filesystem can not be safely mounted by this kernel.");
165 return -EINVAL;
166 }
167 } else if (xfs_sb_version_hascrc(sbp)) {
168
169
170
171
172
173
174 if (!xfs_log_check_lsn(mp, sbp->sb_lsn))
175 return -EFSCORRUPTED;
176 }
177
178 if (xfs_sb_version_has_pquotino(sbp)) {
179 if (sbp->sb_qflags & (XFS_OQUOTA_ENFD | XFS_OQUOTA_CHKD)) {
180 xfs_notice(mp,
181 "Version 5 of Super block has XFS_OQUOTA bits.");
182 return -EFSCORRUPTED;
183 }
184 } else if (sbp->sb_qflags & (XFS_PQUOTA_ENFD | XFS_GQUOTA_ENFD |
185 XFS_PQUOTA_CHKD | XFS_GQUOTA_CHKD)) {
186 xfs_notice(mp,
187"Superblock earlier than Version 5 has XFS_[PQ]UOTA_{ENFD|CHKD} bits.");
188 return -EFSCORRUPTED;
189 }
190
191
192
193
194
195
196 if (xfs_sb_version_hassparseinodes(sbp)) {
197 uint32_t align;
198
199 align = XFS_INODES_PER_CHUNK * sbp->sb_inodesize
200 >> sbp->sb_blocklog;
201 if (sbp->sb_inoalignmt != align) {
202 xfs_warn(mp,
203"Inode block alignment (%u) must match chunk size (%u) for sparse inodes.",
204 sbp->sb_inoalignmt, align);
205 return -EINVAL;
206 }
207 }
208
209 if (unlikely(
210 sbp->sb_logstart == 0 && mp->m_logdev_targp == mp->m_ddev_targp)) {
211 xfs_warn(mp,
212 "filesystem is marked as having an external log; "
213 "specify logdev on the mount command line.");
214 return -EINVAL;
215 }
216
217 if (unlikely(
218 sbp->sb_logstart != 0 && mp->m_logdev_targp != mp->m_ddev_targp)) {
219 xfs_warn(mp,
220 "filesystem is marked as having an internal log; "
221 "do not specify logdev on the mount command line.");
222 return -EINVAL;
223 }
224
225
226
227
228
229 if (unlikely(
230 sbp->sb_agcount <= 0 ||
231 sbp->sb_sectsize < XFS_MIN_SECTORSIZE ||
232 sbp->sb_sectsize > XFS_MAX_SECTORSIZE ||
233 sbp->sb_sectlog < XFS_MIN_SECTORSIZE_LOG ||
234 sbp->sb_sectlog > XFS_MAX_SECTORSIZE_LOG ||
235 sbp->sb_sectsize != (1 << sbp->sb_sectlog) ||
236 sbp->sb_blocksize < XFS_MIN_BLOCKSIZE ||
237 sbp->sb_blocksize > XFS_MAX_BLOCKSIZE ||
238 sbp->sb_blocklog < XFS_MIN_BLOCKSIZE_LOG ||
239 sbp->sb_blocklog > XFS_MAX_BLOCKSIZE_LOG ||
240 sbp->sb_blocksize != (1 << sbp->sb_blocklog) ||
241 sbp->sb_dirblklog > XFS_MAX_BLOCKSIZE_LOG ||
242 sbp->sb_inodesize < XFS_DINODE_MIN_SIZE ||
243 sbp->sb_inodesize > XFS_DINODE_MAX_SIZE ||
244 sbp->sb_inodelog < XFS_DINODE_MIN_LOG ||
245 sbp->sb_inodelog > XFS_DINODE_MAX_LOG ||
246 sbp->sb_inodesize != (1 << sbp->sb_inodelog) ||
247 sbp->sb_logsunit > XLOG_MAX_RECORD_BSIZE ||
248 sbp->sb_inopblock != howmany(sbp->sb_blocksize,sbp->sb_inodesize) ||
249 (sbp->sb_blocklog - sbp->sb_inodelog != sbp->sb_inopblog) ||
250 (sbp->sb_rextsize * sbp->sb_blocksize > XFS_MAX_RTEXTSIZE) ||
251 (sbp->sb_rextsize * sbp->sb_blocksize < XFS_MIN_RTEXTSIZE) ||
252 (sbp->sb_imax_pct > 100 ) ||
253 sbp->sb_dblocks == 0 ||
254 sbp->sb_dblocks > XFS_MAX_DBLOCKS(sbp) ||
255 sbp->sb_dblocks < XFS_MIN_DBLOCKS(sbp) ||
256 sbp->sb_shared_vn != 0)) {
257 xfs_notice(mp, "SB sanity check failed");
258 return -EFSCORRUPTED;
259 }
260
261
262
263
264 if (unlikely(sbp->sb_blocksize > PAGE_SIZE)) {
265 xfs_warn(mp,
266 "File system with blocksize %d bytes. "
267 "Only pagesize (%ld) or less will currently work.",
268 sbp->sb_blocksize, PAGE_SIZE);
269 return -ENOSYS;
270 }
271
272
273
274
275 switch (sbp->sb_inodesize) {
276 case 256:
277 case 512:
278 case 1024:
279 case 2048:
280 break;
281 default:
282 xfs_warn(mp, "inode size of %d bytes not supported",
283 sbp->sb_inodesize);
284 return -ENOSYS;
285 }
286
287 if (xfs_sb_validate_fsb_count(sbp, sbp->sb_dblocks) ||
288 xfs_sb_validate_fsb_count(sbp, sbp->sb_rblocks)) {
289 xfs_warn(mp,
290 "file system too large to be mounted on this system.");
291 return -EFBIG;
292 }
293
294 if (check_inprogress && sbp->sb_inprogress) {
295 xfs_warn(mp, "Offline file system operation in progress!");
296 return -EFSCORRUPTED;
297 }
298 return 0;
299}
300
301void
302xfs_sb_quota_from_disk(struct xfs_sb *sbp)
303{
304
305
306
307
308
309
310
311
312
313
314
315 if (sbp->sb_uquotino == 0)
316 sbp->sb_uquotino = NULLFSINO;
317 if (sbp->sb_gquotino == 0)
318 sbp->sb_gquotino = NULLFSINO;
319 if (sbp->sb_pquotino == 0)
320 sbp->sb_pquotino = NULLFSINO;
321
322
323
324
325
326 if (xfs_sb_version_has_pquotino(sbp))
327 return;
328
329 if (sbp->sb_qflags & XFS_OQUOTA_ENFD)
330 sbp->sb_qflags |= (sbp->sb_qflags & XFS_PQUOTA_ACCT) ?
331 XFS_PQUOTA_ENFD : XFS_GQUOTA_ENFD;
332 if (sbp->sb_qflags & XFS_OQUOTA_CHKD)
333 sbp->sb_qflags |= (sbp->sb_qflags & XFS_PQUOTA_ACCT) ?
334 XFS_PQUOTA_CHKD : XFS_GQUOTA_CHKD;
335 sbp->sb_qflags &= ~(XFS_OQUOTA_ENFD | XFS_OQUOTA_CHKD);
336
337 if (sbp->sb_qflags & XFS_PQUOTA_ACCT) {
338
339
340
341
342
343
344
345 sbp->sb_pquotino = sbp->sb_gquotino;
346 sbp->sb_gquotino = NULLFSINO;
347 }
348}
349
350static void
351__xfs_sb_from_disk(
352 struct xfs_sb *to,
353 xfs_dsb_t *from,
354 bool convert_xquota)
355{
356 to->sb_magicnum = be32_to_cpu(from->sb_magicnum);
357 to->sb_blocksize = be32_to_cpu(from->sb_blocksize);
358 to->sb_dblocks = be64_to_cpu(from->sb_dblocks);
359 to->sb_rblocks = be64_to_cpu(from->sb_rblocks);
360 to->sb_rextents = be64_to_cpu(from->sb_rextents);
361 memcpy(&to->sb_uuid, &from->sb_uuid, sizeof(to->sb_uuid));
362 to->sb_logstart = be64_to_cpu(from->sb_logstart);
363 to->sb_rootino = be64_to_cpu(from->sb_rootino);
364 to->sb_rbmino = be64_to_cpu(from->sb_rbmino);
365 to->sb_rsumino = be64_to_cpu(from->sb_rsumino);
366 to->sb_rextsize = be32_to_cpu(from->sb_rextsize);
367 to->sb_agblocks = be32_to_cpu(from->sb_agblocks);
368 to->sb_agcount = be32_to_cpu(from->sb_agcount);
369 to->sb_rbmblocks = be32_to_cpu(from->sb_rbmblocks);
370 to->sb_logblocks = be32_to_cpu(from->sb_logblocks);
371 to->sb_versionnum = be16_to_cpu(from->sb_versionnum);
372 to->sb_sectsize = be16_to_cpu(from->sb_sectsize);
373 to->sb_inodesize = be16_to_cpu(from->sb_inodesize);
374 to->sb_inopblock = be16_to_cpu(from->sb_inopblock);
375 memcpy(&to->sb_fname, &from->sb_fname, sizeof(to->sb_fname));
376 to->sb_blocklog = from->sb_blocklog;
377 to->sb_sectlog = from->sb_sectlog;
378 to->sb_inodelog = from->sb_inodelog;
379 to->sb_inopblog = from->sb_inopblog;
380 to->sb_agblklog = from->sb_agblklog;
381 to->sb_rextslog = from->sb_rextslog;
382 to->sb_inprogress = from->sb_inprogress;
383 to->sb_imax_pct = from->sb_imax_pct;
384 to->sb_icount = be64_to_cpu(from->sb_icount);
385 to->sb_ifree = be64_to_cpu(from->sb_ifree);
386 to->sb_fdblocks = be64_to_cpu(from->sb_fdblocks);
387 to->sb_frextents = be64_to_cpu(from->sb_frextents);
388 to->sb_uquotino = be64_to_cpu(from->sb_uquotino);
389 to->sb_gquotino = be64_to_cpu(from->sb_gquotino);
390 to->sb_qflags = be16_to_cpu(from->sb_qflags);
391 to->sb_flags = from->sb_flags;
392 to->sb_shared_vn = from->sb_shared_vn;
393 to->sb_inoalignmt = be32_to_cpu(from->sb_inoalignmt);
394 to->sb_unit = be32_to_cpu(from->sb_unit);
395 to->sb_width = be32_to_cpu(from->sb_width);
396 to->sb_dirblklog = from->sb_dirblklog;
397 to->sb_logsectlog = from->sb_logsectlog;
398 to->sb_logsectsize = be16_to_cpu(from->sb_logsectsize);
399 to->sb_logsunit = be32_to_cpu(from->sb_logsunit);
400 to->sb_features2 = be32_to_cpu(from->sb_features2);
401 to->sb_bad_features2 = be32_to_cpu(from->sb_bad_features2);
402 to->sb_features_compat = be32_to_cpu(from->sb_features_compat);
403 to->sb_features_ro_compat = be32_to_cpu(from->sb_features_ro_compat);
404 to->sb_features_incompat = be32_to_cpu(from->sb_features_incompat);
405 to->sb_features_log_incompat =
406 be32_to_cpu(from->sb_features_log_incompat);
407
408 to->sb_crc = 0;
409 to->sb_spino_align = be32_to_cpu(from->sb_spino_align);
410 to->sb_pquotino = be64_to_cpu(from->sb_pquotino);
411 to->sb_lsn = be64_to_cpu(from->sb_lsn);
412
413
414
415
416 if (xfs_sb_version_hasmetauuid(to))
417 uuid_copy(&to->sb_meta_uuid, &from->sb_meta_uuid);
418 else
419 uuid_copy(&to->sb_meta_uuid, &from->sb_uuid);
420
421 if (convert_xquota)
422 xfs_sb_quota_from_disk(to);
423}
424
425void
426xfs_sb_from_disk(
427 struct xfs_sb *to,
428 xfs_dsb_t *from)
429{
430 __xfs_sb_from_disk(to, from, true);
431}
432
433static void
434xfs_sb_quota_to_disk(
435 struct xfs_dsb *to,
436 struct xfs_sb *from)
437{
438 __uint16_t qflags = from->sb_qflags;
439
440 to->sb_uquotino = cpu_to_be64(from->sb_uquotino);
441 if (xfs_sb_version_has_pquotino(from)) {
442 to->sb_qflags = cpu_to_be16(from->sb_qflags);
443 to->sb_gquotino = cpu_to_be64(from->sb_gquotino);
444 to->sb_pquotino = cpu_to_be64(from->sb_pquotino);
445 return;
446 }
447
448
449
450
451
452
453 qflags &= ~(XFS_PQUOTA_ENFD | XFS_PQUOTA_CHKD |
454 XFS_GQUOTA_ENFD | XFS_GQUOTA_CHKD);
455
456 if (from->sb_qflags &
457 (XFS_PQUOTA_ENFD | XFS_GQUOTA_ENFD))
458 qflags |= XFS_OQUOTA_ENFD;
459 if (from->sb_qflags &
460 (XFS_PQUOTA_CHKD | XFS_GQUOTA_CHKD))
461 qflags |= XFS_OQUOTA_CHKD;
462 to->sb_qflags = cpu_to_be16(qflags);
463
464
465
466
467
468
469
470
471
472
473 if (from->sb_qflags & XFS_GQUOTA_ACCT)
474 to->sb_gquotino = cpu_to_be64(from->sb_gquotino);
475 else if (from->sb_qflags & XFS_PQUOTA_ACCT)
476 to->sb_gquotino = cpu_to_be64(from->sb_pquotino);
477 else {
478
479
480
481
482
483
484 if (from->sb_gquotino == NULLFSINO &&
485 from->sb_pquotino == NULLFSINO)
486 to->sb_gquotino = cpu_to_be64(NULLFSINO);
487 }
488
489 to->sb_pquotino = 0;
490}
491
492void
493xfs_sb_to_disk(
494 struct xfs_dsb *to,
495 struct xfs_sb *from)
496{
497 xfs_sb_quota_to_disk(to, from);
498
499 to->sb_magicnum = cpu_to_be32(from->sb_magicnum);
500 to->sb_blocksize = cpu_to_be32(from->sb_blocksize);
501 to->sb_dblocks = cpu_to_be64(from->sb_dblocks);
502 to->sb_rblocks = cpu_to_be64(from->sb_rblocks);
503 to->sb_rextents = cpu_to_be64(from->sb_rextents);
504 memcpy(&to->sb_uuid, &from->sb_uuid, sizeof(to->sb_uuid));
505 to->sb_logstart = cpu_to_be64(from->sb_logstart);
506 to->sb_rootino = cpu_to_be64(from->sb_rootino);
507 to->sb_rbmino = cpu_to_be64(from->sb_rbmino);
508 to->sb_rsumino = cpu_to_be64(from->sb_rsumino);
509 to->sb_rextsize = cpu_to_be32(from->sb_rextsize);
510 to->sb_agblocks = cpu_to_be32(from->sb_agblocks);
511 to->sb_agcount = cpu_to_be32(from->sb_agcount);
512 to->sb_rbmblocks = cpu_to_be32(from->sb_rbmblocks);
513 to->sb_logblocks = cpu_to_be32(from->sb_logblocks);
514 to->sb_versionnum = cpu_to_be16(from->sb_versionnum);
515 to->sb_sectsize = cpu_to_be16(from->sb_sectsize);
516 to->sb_inodesize = cpu_to_be16(from->sb_inodesize);
517 to->sb_inopblock = cpu_to_be16(from->sb_inopblock);
518 memcpy(&to->sb_fname, &from->sb_fname, sizeof(to->sb_fname));
519 to->sb_blocklog = from->sb_blocklog;
520 to->sb_sectlog = from->sb_sectlog;
521 to->sb_inodelog = from->sb_inodelog;
522 to->sb_inopblog = from->sb_inopblog;
523 to->sb_agblklog = from->sb_agblklog;
524 to->sb_rextslog = from->sb_rextslog;
525 to->sb_inprogress = from->sb_inprogress;
526 to->sb_imax_pct = from->sb_imax_pct;
527 to->sb_icount = cpu_to_be64(from->sb_icount);
528 to->sb_ifree = cpu_to_be64(from->sb_ifree);
529 to->sb_fdblocks = cpu_to_be64(from->sb_fdblocks);
530 to->sb_frextents = cpu_to_be64(from->sb_frextents);
531
532 to->sb_flags = from->sb_flags;
533 to->sb_shared_vn = from->sb_shared_vn;
534 to->sb_inoalignmt = cpu_to_be32(from->sb_inoalignmt);
535 to->sb_unit = cpu_to_be32(from->sb_unit);
536 to->sb_width = cpu_to_be32(from->sb_width);
537 to->sb_dirblklog = from->sb_dirblklog;
538 to->sb_logsectlog = from->sb_logsectlog;
539 to->sb_logsectsize = cpu_to_be16(from->sb_logsectsize);
540 to->sb_logsunit = cpu_to_be32(from->sb_logsunit);
541
542
543
544
545
546
547 from->sb_bad_features2 = from->sb_features2;
548 to->sb_features2 = cpu_to_be32(from->sb_features2);
549 to->sb_bad_features2 = cpu_to_be32(from->sb_bad_features2);
550
551 if (xfs_sb_version_hascrc(from)) {
552 to->sb_features_compat = cpu_to_be32(from->sb_features_compat);
553 to->sb_features_ro_compat =
554 cpu_to_be32(from->sb_features_ro_compat);
555 to->sb_features_incompat =
556 cpu_to_be32(from->sb_features_incompat);
557 to->sb_features_log_incompat =
558 cpu_to_be32(from->sb_features_log_incompat);
559 to->sb_spino_align = cpu_to_be32(from->sb_spino_align);
560 to->sb_lsn = cpu_to_be64(from->sb_lsn);
561 if (xfs_sb_version_hasmetauuid(from))
562 uuid_copy(&to->sb_meta_uuid, &from->sb_meta_uuid);
563 }
564}
565
566static int
567xfs_sb_verify(
568 struct xfs_buf *bp,
569 bool check_version)
570{
571 struct xfs_mount *mp = bp->b_target->bt_mount;
572 struct xfs_sb sb;
573
574
575
576
577
578 __xfs_sb_from_disk(&sb, XFS_BUF_TO_SBP(bp), false);
579
580
581
582
583
584 return xfs_mount_validate_sb(mp, &sb, bp->b_bn == XFS_SB_DADDR,
585 check_version);
586}
587
588
589
590
591
592
593
594
595
596
597
598
599
600static void
601xfs_sb_read_verify(
602 struct xfs_buf *bp)
603{
604 struct xfs_mount *mp = bp->b_target->bt_mount;
605 struct xfs_dsb *dsb = XFS_BUF_TO_SBP(bp);
606 int error;
607
608
609
610
611
612 if (dsb->sb_magicnum == cpu_to_be32(XFS_SB_MAGIC) &&
613 (((be16_to_cpu(dsb->sb_versionnum) & XFS_SB_VERSION_NUMBITS) ==
614 XFS_SB_VERSION_5) ||
615 dsb->sb_crc != 0)) {
616
617 if (!xfs_buf_verify_cksum(bp, XFS_SB_CRC_OFF)) {
618
619 if (bp->b_bn == XFS_SB_DADDR ||
620 xfs_sb_version_hascrc(&mp->m_sb)) {
621 error = -EFSBADCRC;
622 goto out_error;
623 }
624 }
625 }
626 error = xfs_sb_verify(bp, true);
627
628out_error:
629 if (error) {
630 xfs_buf_ioerror(bp, error);
631 if (error == -EFSCORRUPTED || error == -EFSBADCRC)
632 xfs_verifier_error(bp);
633 }
634}
635
636
637
638
639
640
641
642static void
643xfs_sb_quiet_read_verify(
644 struct xfs_buf *bp)
645{
646 struct xfs_dsb *dsb = XFS_BUF_TO_SBP(bp);
647
648 if (dsb->sb_magicnum == cpu_to_be32(XFS_SB_MAGIC)) {
649
650 xfs_sb_read_verify(bp);
651 return;
652 }
653
654 xfs_buf_ioerror(bp, -EWRONGFS);
655}
656
657static void
658xfs_sb_write_verify(
659 struct xfs_buf *bp)
660{
661 struct xfs_mount *mp = bp->b_target->bt_mount;
662 struct xfs_buf_log_item *bip = bp->b_fspriv;
663 int error;
664
665 error = xfs_sb_verify(bp, false);
666 if (error) {
667 xfs_buf_ioerror(bp, error);
668 xfs_verifier_error(bp);
669 return;
670 }
671
672 if (!xfs_sb_version_hascrc(&mp->m_sb))
673 return;
674
675 if (bip)
676 XFS_BUF_TO_SBP(bp)->sb_lsn = cpu_to_be64(bip->bli_item.li_lsn);
677
678 xfs_buf_update_cksum(bp, XFS_SB_CRC_OFF);
679}
680
681const struct xfs_buf_ops xfs_sb_buf_ops = {
682 .name = "xfs_sb",
683 .verify_read = xfs_sb_read_verify,
684 .verify_write = xfs_sb_write_verify,
685};
686
687const struct xfs_buf_ops xfs_sb_quiet_buf_ops = {
688 .name = "xfs_sb_quiet",
689 .verify_read = xfs_sb_quiet_read_verify,
690 .verify_write = xfs_sb_write_verify,
691};
692
693
694
695
696
697
698
699
700void
701xfs_sb_mount_common(
702 struct xfs_mount *mp,
703 struct xfs_sb *sbp)
704{
705 mp->m_agfrotor = mp->m_agirotor = 0;
706 spin_lock_init(&mp->m_agirotor_lock);
707 mp->m_maxagi = mp->m_sb.sb_agcount;
708 mp->m_blkbit_log = sbp->sb_blocklog + XFS_NBBYLOG;
709 mp->m_blkbb_log = sbp->sb_blocklog - BBSHIFT;
710 mp->m_sectbb_log = sbp->sb_sectlog - BBSHIFT;
711 mp->m_agno_log = xfs_highbit32(sbp->sb_agcount - 1) + 1;
712 mp->m_agino_log = sbp->sb_inopblog + sbp->sb_agblklog;
713 mp->m_blockmask = sbp->sb_blocksize - 1;
714 mp->m_blockwsize = sbp->sb_blocksize >> XFS_WORDLOG;
715 mp->m_blockwmask = mp->m_blockwsize - 1;
716
717 mp->m_alloc_mxr[0] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, 1);
718 mp->m_alloc_mxr[1] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, 0);
719 mp->m_alloc_mnr[0] = mp->m_alloc_mxr[0] / 2;
720 mp->m_alloc_mnr[1] = mp->m_alloc_mxr[1] / 2;
721
722 mp->m_inobt_mxr[0] = xfs_inobt_maxrecs(mp, sbp->sb_blocksize, 1);
723 mp->m_inobt_mxr[1] = xfs_inobt_maxrecs(mp, sbp->sb_blocksize, 0);
724 mp->m_inobt_mnr[0] = mp->m_inobt_mxr[0] / 2;
725 mp->m_inobt_mnr[1] = mp->m_inobt_mxr[1] / 2;
726
727 mp->m_bmap_dmxr[0] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, 1);
728 mp->m_bmap_dmxr[1] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, 0);
729 mp->m_bmap_dmnr[0] = mp->m_bmap_dmxr[0] / 2;
730 mp->m_bmap_dmnr[1] = mp->m_bmap_dmxr[1] / 2;
731
732 mp->m_bsize = XFS_FSB_TO_BB(mp, 1);
733 mp->m_ialloc_inos = (int)MAX((__uint16_t)XFS_INODES_PER_CHUNK,
734 sbp->sb_inopblock);
735 mp->m_ialloc_blks = mp->m_ialloc_inos >> sbp->sb_inopblog;
736
737 if (sbp->sb_spino_align)
738 mp->m_ialloc_min_blks = sbp->sb_spino_align;
739 else
740 mp->m_ialloc_min_blks = mp->m_ialloc_blks;
741}
742
743
744
745
746
747
748
749
750
751int
752xfs_initialize_perag_data(
753 struct xfs_mount *mp,
754 xfs_agnumber_t agcount)
755{
756 xfs_agnumber_t index;
757 xfs_perag_t *pag;
758 xfs_sb_t *sbp = &mp->m_sb;
759 uint64_t ifree = 0;
760 uint64_t ialloc = 0;
761 uint64_t bfree = 0;
762 uint64_t bfreelst = 0;
763 uint64_t btree = 0;
764 int error;
765
766 for (index = 0; index < agcount; index++) {
767
768
769
770
771
772 error = xfs_alloc_pagf_init(mp, NULL, index, 0);
773 if (error)
774 return error;
775
776 error = xfs_ialloc_pagi_init(mp, NULL, index);
777 if (error)
778 return error;
779 pag = xfs_perag_get(mp, index);
780 ifree += pag->pagi_freecount;
781 ialloc += pag->pagi_count;
782 bfree += pag->pagf_freeblks;
783 bfreelst += pag->pagf_flcount;
784 btree += pag->pagf_btreeblks;
785 xfs_perag_put(pag);
786 }
787
788
789 spin_lock(&mp->m_sb_lock);
790 sbp->sb_ifree = ifree;
791 sbp->sb_icount = ialloc;
792 sbp->sb_fdblocks = bfree + bfreelst + btree;
793 spin_unlock(&mp->m_sb_lock);
794
795 xfs_reinit_percpu_counters(mp);
796
797 return 0;
798}
799
800
801
802
803
804
805
806void
807xfs_log_sb(
808 struct xfs_trans *tp)
809{
810 struct xfs_mount *mp = tp->t_mountp;
811 struct xfs_buf *bp = xfs_trans_getsb(tp, mp, 0);
812
813 mp->m_sb.sb_icount = percpu_counter_sum(&mp->m_icount);
814 mp->m_sb.sb_ifree = percpu_counter_sum(&mp->m_ifree);
815 mp->m_sb.sb_fdblocks = percpu_counter_sum(&mp->m_fdblocks);
816
817 xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb);
818 xfs_trans_buf_set_type(tp, bp, XFS_BLFT_SB_BUF);
819 xfs_trans_log_buf(tp, bp, 0, sizeof(struct xfs_dsb));
820}
821
822
823
824
825
826
827
828
829
830
831
832
833int
834xfs_sync_sb(
835 struct xfs_mount *mp,
836 bool wait)
837{
838 struct xfs_trans *tp;
839 int error;
840
841 tp = _xfs_trans_alloc(mp, XFS_TRANS_SB_CHANGE, KM_SLEEP);
842 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_sb, 0, 0);
843 if (error) {
844 xfs_trans_cancel(tp);
845 return error;
846 }
847
848 xfs_log_sb(tp);
849 if (wait)
850 xfs_trans_set_sync(tp);
851 return xfs_trans_commit(tp);
852}
853